CN219670664U - Water electrolysis trough bipolar plate with taper self-tightening seal structure - Google Patents
Water electrolysis trough bipolar plate with taper self-tightening seal structure Download PDFInfo
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- CN219670664U CN219670664U CN202320770804.4U CN202320770804U CN219670664U CN 219670664 U CN219670664 U CN 219670664U CN 202320770804 U CN202320770804 U CN 202320770804U CN 219670664 U CN219670664 U CN 219670664U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 153
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 24
- 238000009826 distribution Methods 0.000 claims abstract description 126
- 239000001257 hydrogen Substances 0.000 claims abstract description 85
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 85
- 238000007789 sealing Methods 0.000 claims abstract description 68
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000006243 chemical reaction Methods 0.000 claims abstract description 58
- 239000007789 gas Substances 0.000 claims abstract description 35
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000001301 oxygen Substances 0.000 claims abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims description 29
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 14
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model relates to a water electrolytic bath bipolar plate with a conical self-tightening sealing structure, which comprises a cathode plate and an anode plate, wherein the cathode plate is provided with a cathode flow field reaction zone, a cathode flow field distribution zone and a hydrogen outlet which are sequentially communicated; the cathode flow field reaction zone comprises a plurality of cathode flow field ridges which are arranged at intervals to form a hydrogen transmission channel; the anode plate is provided with a water inlet, an anode plate water inlet flow field distribution area, an anode flow field reaction area, an anode plate outlet flow field distribution area and water and gas outlets which are sequentially communicated; the anode flow field reaction zone comprises a plurality of anode plate flow field ridges which are arranged at intervals to form a transmission channel of water and oxygen; the hydrogen outlet, the water inlet, the water and the gas outlet are provided with sealing ring grooves with inverted trapezoid cross sections, and the sealing ring grooves are embedded with sealing rings which are matched. Compared with the prior art, the utility model realizes the long-term high-efficiency and stable operation of the high-pressure water electrolysis tank through the flow field and the sealing structure design, and simultaneously can reduce the use cost of the electrolysis tank.
Description
Technical Field
The utility model belongs to the technical field of hydrogen production by water electrolysis, and relates to a water electrolysis tank bipolar plate with a conical self-tightening sealing structure.
Background
Hydrogen is considered a clean green renewable energy source because of the energy stored in the H-H bonds, hydrogen has a high mass energy density (140 MJ kg -1 ) Is the gasoline mass energy density (44 MJ kg) -1 ) Is approximately 3 times larger. In the existing hydrogen production method, the electrolyzed water is the most green and can produce the hydrogen with the highest purity (99.999%). The hydrogen production capacity of the electrolyzer will climb to 17 gigawatts by 2026 as reported by the International energy agency, global hydrogen energy observations 2022.
Bipolar plates are one of the core components of an electrolytic cell, typically having a central flow field region (multi-channel composition) and a peripheral region surrounding the central region. The bipolar plate flow field region serves to uniformly distribute the reactant (water), ensure efficient transport of the product (gas), and provide a conductive path to the reaction sites. Thus, optimization and design of the flow field area has a critical impact on cell performance. Typical flow field structures have parallel channels, serpentine channels, interdigitated channels, grid channels, etc. of series/parallel configuration, which have problems in achieving uniform water/gas or pressure drop balance, reducing the performance of the water cell.
The area of the periphery of the flow field area of the bipolar plate needs to be provided with a sealing structure to prevent leakage of water and gas. The development of high operating pressure electrolytic water hydrogen production technology can reduce the back-end use cost, and it is reported that when the hydrogen production pressure exceeds 15MPa, the back-end compression system can be omitted. High operating pressures present challenges to the long lasting seal of the cell. The O-shaped sealing matched supporting ring is a sealing form which is conventionally used for a water electrolysis tank at present, however, the sealing form has a larger precision requirement on the structure design of the bipolar plate sealing groove, and is used for avoiding sealing failures such as dislocation, curling, excessive compression or permanent deformation of the O-shaped ring. The utility model patent (CN 114032573A) is characterized in that a protruding umbrella-shaped structure is arranged in a sealing groove of the bipolar plate, and the umbrella-shaped structure is embedded into a sealing ring to realize long-term sealing, so that the structure is difficult to process and high in precision is required.
As can be seen from the above, the bipolar plate structure determines the efficiency and reliability of the electrolyzer. The reasonable bipolar plate structure design not only can improve the hydrolysis efficiency and reduce the energy consumption, but also ensures that the electrolytic tank stably operates for a long time under the high pressure condition, which has important significance in the field.
Disclosure of Invention
The utility model aims to provide a water electrolysis tank bipolar plate with a conical self-tightening sealing structure, which realizes long-term efficient and stable operation of a high-pressure water electrolysis tank through a flow field and a sealing structure design, and can also reduce the use cost of the electrolysis tank.
The aim of the utility model can be achieved by the following technical scheme:
a water electrolysis bath bipolar plate with a conical self-tightening sealing structure comprises a cathode plate and an anode plate, wherein,
the cathode plate is provided with a cathode flow field reaction zone, a cathode flow field distribution zone and a hydrogen outlet which are sequentially communicated;
the cathode flow field reaction zone comprises a cathode plate reaction tank arranged on the cathode plate and a plurality of cathode plate flow field ridges arranged in the cathode plate reaction tank; the flow field ridges of the cathode plates are arranged at intervals and form a hydrogen transmission channel pointing to the hydrogen outlet;
the cathode flow field distribution area comprises a groove body and a plurality of hydrogen distribution piles which are staggered along the hydrogen flow direction;
the anode plate is provided with a water inlet, an anode plate water inlet flow field distribution area, an anode flow field reaction area, an anode plate outlet flow field distribution area and water and gas outlets which are sequentially communicated;
the anode flow field reaction zone comprises an anode plate reaction tank arranged on the anode plate and a plurality of anode plate flow field ridges arranged in the anode plate reaction tank; the anode plate flow field ridges are arranged at intervals and form a water and oxygen transmission channel with two ends pointing to a water inlet and a water and air outlet respectively;
the anode plate water inlet flow field distribution area and the anode plate outlet flow field distribution area comprise a tank body and a plurality of fluid distribution piles which are arranged in the tank body in a staggered manner along the fluid flow direction.
Further, the cathode flow field reaction area and the cathode flow field distribution area are respectively arranged on two opposite sides of the cathode plate and are communicated through a cathode flow channel hole penetrating through the cathode plate;
along the hydrogen flow direction, the cathode runner holes are arranged at the upstream of the plurality of hydrogen distribution piles.
Further, the water inlet flow field distribution area and the anode flow field reaction area of the anode plate are respectively arranged on two opposite sides of the anode plate and are communicated through an anode inlet flow channel hole penetrating through the anode plate; the anode flow field reaction zone and the anode plate outlet flow field distribution zone are respectively arranged on two opposite sides of the anode plate and are communicated through anode outlet runner holes penetrating through the anode plate; along the fluid flow direction, in the water inlet flow field distribution area of the anode plate, anode inlet flow channel holes are arranged at the downstream of the fluid distribution piles; in the anode plate outlet flow field distribution region, anode outlet flow channel holes are arranged upstream of the fluid distribution piles.
Further, the water inlet and the anode plate water inlet flow field distribution area, the anode plate outlet flow field distribution area and the water and air outlet, and the cathode flow field distribution area and the hydrogen outlet are in mutually matched parallelogram shapes.
Further, the plurality of fluid distribution piles and the plurality of hydrogen distribution piles are correspondingly distributed in a parallelogram-shaped array.
Further, the side wall of the water inlet is provided with a side water inlet channel communicated with the water inlet flow field distribution area of the anode plate,
the anode plate water inlet flow field distribution area also comprises a plurality of water inlet diversion straight ridges which are arranged at the side water inlet channel at intervals;
the side wall of the water and gas outlet is provided with a side outlet channel communicated with the flow field distribution area of the anode plate outlet,
the anode plate outlet flow field distribution area also comprises a plurality of outlet diversion straight ridges which are arranged at the side outlet channels at intervals.
Further, a plurality of water inlet guide straight ridges and a plurality of outlet guide straight ridges are respectively arranged at equal intervals. Further, the water inlet diversion straight ridges are obliquely arranged, and the oblique direction is matched with the water inlet flow field distribution area of the parallelogram-shaped anode plate;
the outlet diversion straight ridges are obliquely arranged, and the oblique direction is matched with the parallelogram-shaped outlet flow field distribution area of the anode plate.
Further, the cathode plate flow field ridges comprise short flow field ridges and long flow field ridges which are alternately arranged along the length direction at intervals; the length ratio of the short flow field ridge to the long flow field ridge is (0.8-1.2): 2, preferably 1:2.
Further, the hydrogen outlet, the water inlet, the water and the air outlet are also provided with a sealing ring groove in a winding way, and the sealing ring groove is embedded with a sealing ring.
Further, the section of the sealing ring groove is in an inverted trapezoid shape with a wide top and a narrow bottom, and the half cone angle of the inner side of the inverted trapezoid shape sealing ring groove is 20-25 degrees.
Further, the top length of the inverted trapezoid sealing ring groove is 1.1-13 times of that of the inverted trapezoid sealing ring. According to the utility model, through structural design of the cathode flow field and the anode flow field of the bipolar plate, the travel of reactants and reaction products passing through the channels, especially the anode side, is optimized, the water flow resistance and the pressure difference distribution are balanced, the problem of gas blockage caused by a channel area with low flow velocity is avoided, and the generated gas is better discharged. Meanwhile, through the flow field structural design, the water inlet and air outlet modes are adjusted, the sealing of the cathode flow field reaction area and the anode flow field reaction area is optimized, and the efficient bipolar plate flow field structural design is realized. Meanwhile, the utility model adopts the design of a conical self-tightening sealing structure, the sealing area is provided with an inverted trapezoid groove structure with a fixed half cone angle, and the high-efficiency even distribution and high-pressure sealing effect of the bipolar plate flow field are realized through the design of the bipolar plate structure and the sealing method.
Compared with the prior art, the utility model has the following characteristics:
1) According to the utility model, the hydrogen transmission channels pointing to the hydrogen outlets are formed by the plurality of cathode plate flow field ridges which are arranged at intervals, so that the hydrogen diversion effect is realized, the gas is uniformly distributed, the problem of gas blockage caused by a channel area with low flow velocity is avoided, and the generated gas is better discharged. Likewise, the flow resistance and pressure difference distribution are balanced by forming a water and oxygen transmission channel through a plurality of anode plate flow field ridges which are arranged at intervals, so that the fluid flow resistance is reduced.
2) The cathode flow channel hole is used as a hydrogen inlet of the cathode flow field distribution area, and the introduced hydrogen passes through a plurality of hydrogen distribution piles to further distribute the hydrogen at the outlet, so that the hydrogen is uniformly discharged through the hydrogen outlet. Similarly, the anode runner holes are used as fluid inlets of the anode plate outlet flow field distribution area, and the introduced fluid passes through a plurality of hydrogen distribution piles to further distribute the hydrogen at the outlet, so that the hydrogen is uniformly discharged through the hydrogen outlet.
3) The utility model provides a water electrolysis cell bipolar plate with a conical self-tightening sealing structure and a sealing method, and designs the conical self-tightening sealing structure which is simple, easy to process and low in cost, so that the reliable sealing structure is realized, the water electrolysis cell bipolar plate is suitable for mass production, and the assembly of an electrolysis cell assembly is convenient. Under the condition of ensuring normal and safe operation of the high-voltage electrolytic tank, the sealing cost of the electrolytic tank can be reduced, and the economical efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a front view of a cathode plate in a bipolar plate of a water electrolysis cell with a cone-shaped self-tightening sealing structure;
FIG. 2 is a schematic rear view of a cathode plate in a bipolar plate of a water electrolysis cell with a cone-shaped self-tightening seal structure according to the present utility model;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
FIG. 4 is a partial enlarged view at B in FIG. 2;
FIG. 5 is a schematic diagram of the front view of an anode plate in a bipolar plate of a water electrolysis cell with a cone-shaped self-tightening sealing structure according to the present utility model;
FIG. 6 is a schematic diagram of the rear view of an anode plate in a bipolar plate of a water electrolysis cell with a cone-shaped self-tightening seal structure according to the present utility model;
FIG. 7 is an enlarged view of a portion of FIG. 6 at C;
FIG. 8 is a partial enlarged view at D in FIG. 6;
FIGS. 9 and 11 are schematic views showing the assembled structures of a cathode plate, an anode plate and a proton exchange membrane;
FIG. 10 is an enlarged view of a portion of FIG. 9 at E;
FIG. 12 is a schematic diagram of an exploded structure of a cathode plate, an anode plate, and a proton exchange membrane;
FIG. 13 is a schematic view of the structure where the hydrogen outlet connects with the cathode flow field reaction zone and the cathode flow field distribution zone;
FIG. 14 is a schematic view of the structure where the water inlet is connected to the anode plate water inlet flow field distribution region and the anode flow field reaction region;
FIG. 15 is a schematic perspective view of an anode plate in a bipolar plate of a water electrolysis cell with a cone-shaped self-tightening sealing structure according to the present utility model;
the figure indicates:
100-cathode plate,
101-cathode flow field reaction zone, 102-cathode plate flow field ridge, 103-hydrogen transmission channel, 104-hydrogen outlet, 105-cathode flow field distribution zone and 106-cathode flow channel hole;
200-anode plate,
201-anode flow field reaction zone, 202-anode plate flow field ridge, 203-water and oxygen transmission channel, 204-water inlet, 205-water and gas outlet, 206-anode plate water inlet flow field distribution zone, 207-anode plate outlet flow field distribution zone, 208-anode inlet flow channel hole, 209-anode outlet flow channel hole, 210-water diversion straight ridge, 211-fluid distribution pile, 212-outlet diversion straight ridge;
300-hydrogen distribution piles, 500-side air outlet channels and 600-side water inlet channels.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples. The following examples are given with the above technical solutions of the present utility model as a premise, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present utility model is not limited to the following examples.
Example 1:
a water electrolysis cell bipolar plate with a cone-shaped self-tightening sealing structure comprises a cathode plate 100 and an anode plate 200. As shown in fig. 1-2, a cathode flow field reaction area 101, a cathode flow field distribution area 105 and a hydrogen outlet 104 which are sequentially communicated are arranged on a cathode plate 100; the cathode flow field reaction zone 101 comprises a cathode plate reaction tank arranged on the cathode plate 100 and a plurality of cathode plate flow field ridges 102 arranged in the cathode plate reaction tank; the cathode plate flow field ridges 102 are arranged at equal intervals and form a hydrogen transmission channel 103 pointing to the hydrogen outlet 104; the cathode flow field distribution area 105 comprises a tank body and a plurality of hydrogen distribution piles 300 which are staggered along the hydrogen flow direction;
as shown in fig. 5 to 6, the anode plate 200 is provided with a water inlet 204, an anode plate water inlet flow field distribution area 206, an anode flow field reaction area 201, an anode plate outlet flow field distribution area 207 and a water and gas outlet 205 which are sequentially communicated; the anode flow field reaction zone 201 comprises an anode plate reaction tank arranged on the anode plate 200 and a plurality of anode plate flow field ridges 202 arranged in the anode plate reaction tank; the anode plate flow field ridges 202 are arranged at equal intervals and form a water and oxygen transmission channel 203 which points to the water inlet 204 and the water and gas outlet 205 at the two ends respectively; the anode plate water inlet flow field distribution area 206 and the anode plate outlet flow field distribution area 207 comprise a tank body and a plurality of fluid distribution piles 211 which are arranged in the tank body in a staggered manner along the fluid flow direction. The hydrogen transmission channels 103 pointing to the hydrogen outlets 104 are formed by the cathode plate flow field ridges 102 which are arranged at equal intervals, so that the hydrogen diversion effect is achieved, the gas is uniformly distributed, the problem of gas blockage caused by a channel area with low flow velocity is avoided, and the generated gas is better discharged. Likewise, the flow resistance and pressure differential distribution are balanced by forming the water and oxygen transfer channels 203 through a plurality of anode plate flow field ridges 202 arranged at equal intervals, thereby reducing the flow resistance.
Namely, the flow field structure design of the cathode and the anode of the bipolar plate optimizes the travel of reactants and reaction products through the channels, particularly on the anode side, balances the water flow resistance and the pressure difference distribution, avoids the problem of gas blockage caused by a channel area with low flow velocity, and ensures that the generated gas is better discharged. Meanwhile, through the flow field structural design, the water inlet and air outlet modes are adjusted, the sealing of the cathode flow field reaction area and the anode flow field reaction area is optimized, and the efficient bipolar plate flow field structural design is realized.
In some embodiments, as shown in fig. 3-4, the cathode flow field reaction zone 101 and the cathode flow field distribution zone 105 are disposed on opposite sides of the cathode plate 100, respectively, and are in communication through cathode flow channel holes 106 disposed through the cathode plate 100; the cathode flow holes 106 are provided upstream of the plurality of hydrogen distribution piles 300 in the hydrogen flow direction.
In some embodiments, as shown in fig. 7-8 and 15, the anode plate water inlet flow field distribution region 206 and the anode flow field reaction region 201 are respectively disposed on two opposite sides of the anode plate 200 and are communicated through an anode inlet flow channel hole 208 disposed through the anode plate 200; the anode flow field reaction zone 201 and the anode plate outlet flow field distribution zone 207 are respectively arranged on two opposite sides of the anode plate 200 and are communicated through an anode outlet runner hole 209 penetrating through the anode plate 200; in the fluid flow direction, in the anode plate water inlet flow field distribution region 206, anode inlet flow channel holes 208 are provided downstream of the fluid distribution piles 211; in the anode plate outlet flow field distribution region 207, anode outlet flow channel holes 209 are provided upstream of the fluid distribution stake 211.
The cathode flow holes 106 serve as hydrogen inlets to the cathode flow field distribution region 105, and the introduced hydrogen passes through the plurality of hydrogen distribution piles 300 to further distribute the hydrogen at the outlet so that it is uniformly discharged through the hydrogen outlet 104. Similarly, the anode inlet flow field apertures 208 serve as fluid inlets to the anode plate outlet flow field distribution region 207, and the introduced fluid passes through a plurality of hydrogen distribution piles 300 to further distribute the hydrogen gas at the outlet so that it is uniformly discharged through the hydrogen outlet 104.
In some embodiments, the water inlet 204 and anode plate water inlet flow field distribution region 206, anode plate outlet flow field distribution region 207 and water and gas outlet 205, cathode flow field distribution region 105 and hydrogen outlet 104 are in a parallelogram shape that is mutually adapted.
In some specific embodiments, the plurality of fluid distribution piles 211, the plurality of hydrogen distribution piles 300 are correspondingly distributed in a parallelogram-shaped array. And it is preferable that the fluid distribution stake 211 of the latter column corresponds to the middle of the adjacent 2 fluid distribution stakes 211 of the former column, thereby improving the fluid uniform distribution effect.
In some embodiments, the anode plate inlet flow field distribution region 206 and the anode plate outlet flow field distribution region 207 are in a central symmetrical structure.
In some specific embodiments, the side wall of the water inlet 204 is provided with a side water inlet channel 600 communicated with the water inlet flow field distribution area 206 of the anode plate, and the water inlet flow field distribution area 206 of the anode plate further comprises a plurality of water inlet diversion straight ridges 210 which are arranged at the side water inlet channel 600 at equal intervals; the water and gas outlets 205 are provided with side outlet channels communicating with the anode plate outlet flow field distribution region 207, and the anode plate outlet flow field distribution region 207 further comprises a plurality of outlet flow guide straight ridges 212 equally spaced at the side outlet channels.
In some embodiments, the inlet guide straight ridges 210 are inclined and the direction of inclination is adapted to the parallelogram-shaped anode plate inlet flow field distribution 206; the straight ridges 212 of the outlet flow guide are obliquely arranged, and the oblique direction is matched with the outlet flow field distribution area 207 of the anode plate in a parallelogram shape, so that the channel distances of water passing through the flow field distribution area and the flow field reaction area are equal.
In some embodiments, the inlet guide straight ridge 210 is angled at 120 °.
In some specific embodiments, the cathode plate flow field ridges 102 comprise short flow field ridges and long flow field ridges that are staggered at intervals along the length direction and are arranged in an array; the length ratio of the short flow field ridge to the long flow field ridge is (0.8-1.2): 2, preferably 1:2. Short flow field ridges and long flow field ridges which are arranged at intervals in a staggered way form transverse channels perpendicular to the length direction, and the transverse channels play a role in transverse mixing and distributing of hydrogen.
In some specific embodiments, the hydrogen outlet 104, the water inlet 204, and the water and gas outlet 205 are further surrounded by a seal ring groove 401, and the seal ring groove 401 is embedded with a seal ring 400.
In some embodiments, the cathode plate 100 is provided with a water inlet 204, a water outlet 205 and a gas outlet 205, and the anode plate 200 is provided with a hydrogen outlet 104; when stacked and assembled, the water inlet 204, the water and gas outlet 205, and the hydrogen outlet 104 on the cathode plate 100 and the anode plate 200 are respectively butted to form a water inlet channel, a water and gas discharge channel, and a hydrogen outlet channel.
In some specific embodiments, the cross section of the seal ring groove 401 is in an inverted trapezoid shape with a wide top and a narrow bottom, and the half cone angle of the inner side of the inverted trapezoid shape seal ring groove 401 is 23 degrees, so that a conical self-tightening seal structure can be formed after the seal ring 400 is placed. Preferably, the sealing ring 400 is in interference fit with the sealing ring groove 401, and the width of the top of the inverted trapezoid sealing ring 400 is 1.2-1.5 times that of the top of the sealing ring groove 401.
In some preferred embodiments, the material of the seal ring 400 may be any one of ethylene propylene diene monomer, polytetrafluoroethylene, polysulfone, and fluorosilicone.
Example 2:
the water-electrolytic tank bipolar plate with conical self-tightening sealing structure comprises a cathode plate 100 and an anode plate 200 as shown in figures 1-14, wherein the cathode plate 100 and the anode plate 200 both comprise an intermediate flow field area and a sealing area surrounding the outer side of the flow field area, and the flow field area consists of an inlet and an outlet, an inlet and an outlet side channel, a flow field distribution area and a flow field reaction area.
Specifically, the cathode flow field reaction area 101 is provided with cathode flow field ridges 102 which are orderly staggered along the length direction and present an array structure, a groove formed by the ridges and the bottom plate is used for a hydrogen transmission channel 103, one side along the length direction is provided with two hydrogen outlets 104, the back surface of the cathode flow field area is provided with a cylindrical cathode flow field distribution area 105 close to the hydrogen outlets 104, the flow field distribution area is communicated with the hydrogen outlets 104, and the cathode flow field reaction area 101 is communicated with the cathode flow field distribution area 105 through cathode flow channel holes 106 which are arranged close to the hydrogen outlets 104 through the hydrogen transmission channel 103.
Specifically, the anode flow field reaction zone 201 is provided with anode plate flow field ridges 202 with an array structure along the width direction, grooves formed by the ridges and the bottom plate are used for transmitting channels 203 of water and oxygen, one side of the flow field reaction zone 201 is provided with two water inlets 204, the other side of the flow field reaction zone 201 is provided with two water and gas outlets 205, the back surface of the anode plate flow field zone is close to an inlet and an outlet respectively provided with an anode plate water inlet flow field distribution zone 206 and an anode plate water outlet and oxygen outlet flow field distribution zone 207, the flow field distribution zone is communicated with the inlet and outlet, and the flow field reaction zone 201 is communicated with the anode plate water inlet flow field distribution zone 206 and the anode plate water outlet and oxygen outlet flow field distribution zone 207 respectively through anode inlet flow channel holes 208 and anode outlet flow channel holes 209 which are arranged close to the inlet and outlet respectively through the hydrogen transmission channels 103.
Specifically, the anode flow field distribution area comprises water diversion straight ridges 210 and fluid distribution piles 211 with an array structure, the straight ridges are connected with the water inlet, the angle of the horizontal direction is 120 degrees, and the two flow field distribution areas are in a central symmetry structure. In the flow field distribution region of the cathode plate and the anode plate, any one of the adjacent columns of cylindrical protrusions is provided at the other column of two adjacent fluid distribution piles 211.
Specifically, the cathode plate is respectively provided with two water inlets 204, water outlets 205 and gas outlets 205, the anode plate is provided with two hydrogen outlets 104, in the use process, the cathode plate and the anode plate are welded together by adopting vacuum diffusion welding, and the water inlets 204, the water outlets 205 and the gas outlets 104 of the cathode plate and the anode plate can be respectively matched and communicated with the hydrogen outlets 104.
Specifically, during the use of the bipolar plate in the electrolytic cell, the cathode flow field reaction area 101 generates hydrogen evolution reaction, generated hydrogen and a small amount of water transferred from the anode side pass through the hydrogen transmission channel 103, reach the cathode flow field distribution area 105 on the back side through the cathode flow channel hole 106, and finally reach the hydrogen outlet 104 through the side air outlet channel 500 to be discharged.
Specifically, during the use of the bipolar plate in the electrolytic tank, water flows through the anode plate water inlet flow field distribution area 206 at the back side of the anode plate from the side water inlet channel 600 of the anode plate water inlet 204, after being uniformly distributed, the water passes through the anode outlet flow channel holes 209, is uniformly distributed in the straight water and oxygen transmission channels 203, oxygen evolution reaction occurs in the flow field reaction area 201, the generated oxygen and unconsumed water reach the anode plate water outlet oxygen flow field distribution area 207 at the back side through the anode outlet flow channel holes 209, and finally reach the water and gas outlet 205 through the side water outlet channels to be discharged.
Specifically, as shown in fig. 9-10, the bipolar plate sealing area is provided with grooves of inverted trapezoid structure 400, and the inner half cone angles are 23 degrees. One end of the gasket for sealing is of a trapezoid structure 401, the half cone angle is 23 degrees, the upper bottom of the trapezoid groove of the gasket is 1.2 times of the upper bottom of the trapezoid groove of the gasket, the gasket for sealing at the conical top of the gasket is made of a high-hardness ethylene propylene diene monomer gasket, and the compression ratio of the gasket in the thickness direction of the assembly is 20% during sealing so as to form a conical self-tightening sealing structure, so that the requirement of high-pressure sealing is met, as shown in fig. 11-12.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present utility model. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present utility model is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present utility model.
Claims (10)
1. A water electrolysis cell bipolar plate with a cone-shaped self-tightening sealing structure comprises a cathode plate (100) and an anode plate (200), and is characterized in that,
the cathode plate (100) is provided with a cathode flow field reaction zone (101), a cathode flow field distribution zone (105) and a hydrogen outlet (104) which are sequentially communicated;
the cathode flow field reaction zone (101) comprises a cathode plate reaction tank arranged on the cathode plate (100) and a plurality of cathode plate flow field ridges (102) arranged in the cathode plate reaction tank; a plurality of cathode plate flow field ridges (102) are arranged at intervals and form a hydrogen transmission channel (103) pointing to a hydrogen outlet (104);
the cathode flow field distribution area (105) comprises a groove body and a plurality of hydrogen distribution piles (300) which are staggered along the hydrogen flow direction;
the anode plate (200) is provided with a water inlet (204), an anode plate water inlet flow field distribution area (206), an anode flow field reaction area (201), an anode plate outlet flow field distribution area (207) and a water and gas outlet (205) which are sequentially communicated;
the anode flow field reaction zone (201) comprises an anode plate reaction tank arranged on the anode plate (200) and a plurality of anode plate flow field ridges (202) arranged in the anode plate reaction tank; the anode plate flow field ridges (202) are arranged at intervals and form a water and oxygen transmission channel (203) which points to the water inlet (204) and the water and gas outlet (205) at the two ends respectively;
the anode plate water inlet flow field distribution area (206) and the anode plate outlet flow field distribution area (207) comprise a tank body and a plurality of fluid distribution piles (211) which are arranged in the tank body in a staggered manner along the fluid flow direction;
the hydrogen gas outlet (104), the water inlet (204), the water and gas outlet (205) are further provided with a sealing ring groove (401) in a winding mode, the section of the sealing ring groove (401) is in an inverted trapezoid shape with a wide top and a narrow bottom, and the sealing ring groove (401) is internally provided with a sealing ring (400) with a shape matched with the shape.
2. The bipolar plate of the water electrolysis cell with the conical self-tightening sealing structure according to claim 1, wherein the cathode flow field reaction area (101) and the cathode flow field distribution area (105) are respectively arranged on two opposite sides of the cathode plate (100) and are communicated through cathode runner holes (106) penetrating through the cathode plate (100);
the cathode runner holes (106) are arranged at the upstream of the plurality of hydrogen distribution piles (300) along the flow direction of the hydrogen.
3. The bipolar plate of the water electrolysis cell with the conical self-tightening sealing structure according to claim 1, wherein the water inlet flow field distribution area (206) and the anode flow field reaction area (201) of the anode plate are respectively arranged on two opposite sides of the anode plate (200) and are communicated through anode inlet flow channel holes (208) penetrating through the anode plate (200); the anode flow field reaction zone (201) and the anode plate outlet flow field distribution zone (207) are respectively arranged on two opposite sides of the anode plate (200) and are communicated through anode outlet runner holes (209) penetrating through the anode plate (200); in the fluid flow direction, in the anode plate water inlet flow field distribution area (206), anode inlet flow channel holes (208) are arranged at the downstream of the fluid distribution piles (211); in the anode plate outlet flow field distribution region (207), anode outlet flow channel apertures (209) are provided upstream of the fluid distribution pegs (211).
4. The bipolar plate of the water electrolyzer with the conical self-tightening sealing structure according to claim 1, wherein the water inlet (204) and the anode plate water inlet flow field distribution area (206), the anode plate outlet flow field distribution area (207) and the water and gas outlet (205), the cathode flow field distribution area (105) and the hydrogen outlet (104) are in a parallelogram shape which is mutually matched.
5. The water electrolyzer bipolar plate with tapered self-tightening sealing structure according to claim 4, wherein the plurality of fluid distribution piles (211) and the plurality of hydrogen distribution piles (300) are correspondingly distributed in a parallelogram-shaped array.
6. The bipolar plate of the water separator with the conical self-tightening sealing structure according to claim 4, wherein the side wall of the water inlet (204) is provided with a side water inlet channel (600) communicated with the water inlet flow field distribution area (206) of the anode plate,
the anode plate water inlet flow field distribution area (206) also comprises a plurality of water inlet diversion straight ridges (210) which are arranged at the side water inlet channel (600) at intervals;
the side wall of the water and gas outlet (205) is provided with a side outlet channel communicated with an anode plate outlet flow field distribution area (207),
the anode plate outlet flow field distribution region (207) also includes a plurality of outlet flow directing straight ridges (212) spaced apart at the side outlet channels.
7. The bipolar plate of a water separator with a cone-shaped self-tightening sealing structure according to claim 6, wherein the water inlet guide straight ridges (210) are obliquely arranged, and the oblique direction is matched with the water inlet flow field distribution area (206) of the anode plate in a parallelogram shape;
the outlet diversion straight ridges (212) are obliquely arranged, and the oblique direction is matched with the parallelogram-shaped outlet flow field distribution area (207) of the anode plate.
8. The bipolar plate of a water separator with a cone-type self-tightening seal structure according to claim 1, wherein the cathode plate flow field ridges (102) comprise short flow field ridges and long flow field ridges which are alternately arranged along the length direction at intervals; the length ratio of the short flow field ridge to the long flow field ridge is (0.8-1.2): 2.
9. The bipolar plate of a water separator with a cone-shaped self-tightening sealing structure according to claim 1, wherein the inner half cone angle of the inverted trapezoid-shaped sealing ring groove (401) is 20-25 °.
10. The bipolar plate of the water electrolysis cell with the conical self-tightening sealing structure according to claim 1, wherein the top length of the inverted trapezoid sealing ring groove (401) is 1.1-13 times that of the inverted trapezoid sealing ring (400).
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| CN202320770804.4U CN219670664U (en) | 2023-04-10 | 2023-04-10 | Water electrolysis trough bipolar plate with taper self-tightening seal structure |
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| CN202320770804.4U CN219670664U (en) | 2023-04-10 | 2023-04-10 | Water electrolysis trough bipolar plate with taper self-tightening seal structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117468024A (en) * | 2023-10-31 | 2024-01-30 | 温州高企氢能科技有限公司 | Array flow field structure for producing hydrogen by alkaline water electrolysis and electrolytic tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117468024A (en) * | 2023-10-31 | 2024-01-30 | 温州高企氢能科技有限公司 | Array flow field structure for producing hydrogen by alkaline water electrolysis and electrolytic tank |
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